After reading the news on Twitter — just like everybody else — Andy reacted like so, as he recently told ET: “I didn't not see it coming, but I didn’t see it coming. You know what I mean?”

Luann announced that she and Tom had decided to divorce on Twitter last week. "It's with great sadness that Tom & I agreed to divorce," she tweeted. "We care for each other very much, hope you respect our privacy during this sad time!"

The RHONY mom has since jetted off to Switzerland for some R&R, a move that Andy applauded. “I spoke to her the day she was leaving the country,” he told ET. “You know, I think she very wisely is leaving the country to kind of gather her thoughts and get it together. I think it’s all happened in front of the cameras and, if you see the reunion, I think you'll be surprised, because you'll begin to see the first signs of cracks in the relationship at the first part of the reunion.”

Now with the knowledge that Luann and Tom will eventually divorce, Andy teased that RHONY fans will view the upcoming sit-down in a whole different light. You can get a sneak peek of the reunion in the clip, above. "The reunion takes on a new meaning when you know the ending of the story, frankly,” he said. “So, it’s interesting seeing it through that lens … I look forward to talking to Lu about where she's at as soon as I can.”

Of course, RHONY fans know that Tom caused a lot of drama among Luann and her Big Apple pals. So Andy said that he's interested to see how the couple's split affects this friend group moving forward. “I think the wild thing is, she had just gotten all the other women in her corner and rooting for her,” he shared. “That’s what’s also really sad about this, you know? Everybody was on her team.”